Novel chiral copper complex and asymmetric synthesis of cyclopropanecarboxylate derivatives using said complex as catalyst
申请人:SUMITOMO CHEMICAL COMPANY, LIMITED
公开号:EP0128012A2
公开(公告)日:1984-12-12
A chiral copper complex is produced by the reaction of a chiral copper complex of the formula (1):
wherein R, is (a) alkyl group, or (b) aralkyl group; R2 is (a) 2-alkoxyphenyl group, or (b) 1-alkoxy-5-alkylphenyl group; eitherone of X1 and X2 is (a) hydrogen atom, (b) halogen atom, (c) alkyl group, (d) alkoxy group, or (e) nitro group, or adjacent X, and X2 together form a benzo group, with a mono- substituted hydrazine of the formula (2):
wherein R3 is (a) aryl group, (b) aralkyl group, of (c) alkyl group.
The chiral complex is useful as a catalyst for the reaction of an alkyl diazoacetate of the formula (3)
wherein R is an alkyl group, with a prochiral olefin of the formula (4):
wherein each one one A, B, P and Q is selected from the group consisting of (a) hydrogen atom, (b) alkyl groups, (c) aralkyl group, (d) aryl groups, (e) alkenyl groups, (f) alkyl groups containing halogen atom(s), and (g) alkenyl groups containing halogen atom(s),
to form optically-active alkyl cyclopropane carboxylates which are important intermediates in the production of pharmaceuticals and agrochemicals.
一种手性铜络合物是由式(1)的手性铜络合物反应生成的:
其中 R,是(a)烷基,或(b)芳烷基;R2 是(a)2-烷氧基苯基,或(b)1-烷氧基-5-烷基苯基;X1 和 X2 中的一个是(a)氢原子,(b)卤素原子,(c)烷基,(d)烷氧基,或(e)硝基,或相邻的 X 和 X2 一起形成一个苯偶氮基团,与式(2)的单取代肼反应:
其中 R3 是 (a) 芳基、(b) 芳烷基或 (c) 烷基。
手性配合物可用作式(3)重氮乙酸烷基酯反应的催化剂
其中 R 为烷基,与式 (4) 的手性烯烃反应:
其中 A、B、P 和 Q 各选自以下组成的组 (a) 氢原子;(b) 烷基;(c) 芳烷基;(d) 芳基;(e) 烯基;(f) 含卤素原子的烷基;(g) 含卤素原子的烯基、
形成具有光学活性的环丙烷羧酸烷基酯,这是生产药品和农用化学品的重要中间体。